* {
  left: 0;
  margin: 0;
}
audio {
  margin: 20px 0;
  width: 450px;
}
body {
  background-color: #000;
  text-align: center;
  color:#666
}
.container {
  height: 420px;
  /* border: #fff solid; */
  overflow: hidden;
}
.container ul {
  list-style-type: none;
  /* 歌词移动过渡 */
  transition: 1s;
}
.container li {
  line-height: 30px;
  /* 高亮过渡 */
  transition: 0.2s;
}
.container li.active {
  color: #fff;
  transform: scale(1.2);/*效率更高*/
}